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Questions tagged [softwareserial]

A library for emulating UART functionality in software on any available digital IO pins. Use this tag for questions regarding SoftwareSerial.

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25 views

How to use 2 serial port when WifiEsp library uses one of both

I try without success to receive datas from DataPort and transmit them to my computer via WifiPort, using ESP8266 wifi module. Each second, serial datas income on DataPort from another device. ...
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22 views

Arduino robot arm movements sudden movement [closed]

Thank you for taking your time to read my problem. I built a robot arm and I control it through Bluetooth from Android device. All works great, but when I use a slider from app for controlling only ...
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21 views

RS485 Arduino Communication Issue

Friends, I am trying to achieve half duplex communication between two Arduinos using RS485 Protocol. The hardware I am using is a MAX485 module and an Arduino Uno. I am using the SoftwareSerial ...
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23 views

Problem: char string not working with SoftwareSerial.h

I am creating a program to display text on an OLED display and then have it sent to a thermal printer. The issue is my second char string: word_buffer When I try to use word_buffer for any reason it ...
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29 views

SerializeJson not working when using softserial

IDE:1.8.8 Board:Arduino UNO When I use the code below, I get result of print like this. { "result": [ { "ID": "01", "Value": [ "2", "1", "13" ] } ] } But when I use SoftwareSerial and in the setup ...
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29 views

Problems with serial communication from Arduino to ESP8266

I've been trying to get an Arduino and ESP8266 to communicate with each other over serial. The ESP8266 uses the Serial class for communications, while the Arduino uses SoftwareSerial. The problem is ...
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30 views

Enroll finger problem in R307 fingerprint sensor with Arduino Uno

I have done all connection correct according to the example code of Adafruit library, but it can't enroll a fingerprint. It shows only .............., but can't get a finer image. My connections are ...
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173 views

How to chose softserial library use on Arduino project?

I want to do a project that has multiple Arduino communication through UART, that project project one of limit is using Arduino Nano (small and cheap). I need to set 4 serial port instance on Nano to ...
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33 views

Is it possible to make an HTTP get request using AT Commands without knowing the IP address of the web server?

I have the following code that can read a web page using HTTP get but I can only do it because the website I am doing it to has a static IP address, but in my project I am just hosting it on a free ...
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36 views

Arduino ESP8266 ESP-01S GET command

Looking for some help on this please. It is a little long winded, but the point of it is I cannot retrieve a string response via my ESP8266 ESP-01S. I connect my ESP to my Ardiuno using ...
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2answers
48 views

Several Software Serial Ports

I am planning to use an Arduino (Nano ideally, or Other) to send and receive information from several software serial ports to other arduinos, over their available pins, ideally 8 ports. I could ...
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46 views

Measure Sofware Serial write() time

As you probably know, SoftwareSerial uses Interrupts to do some of the timing stuff of the Serial communication. What I am trying to accomplish is to measure the time that it takes SoftwareSerial....
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25 views

Using Arduino as ISP and SoftwareSerial at the same time

I'm trying to use my Arduino Uno as an ISP to program an ATTiny85 and at the same time check my board by using the SoftwareSerial library to output the values I'm getting from my sensor. Is this ...
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30 views

ESP-8266 stopped working due to possibly faulty perfboard layout

I have been following this tutorial to set up my ESP8266. I have also recreated on a perfboard the circuit provided in the tutorial, and I intend to use this perfboard circuit in my project. The ...
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1answer
432 views

Did not find fingerprint sensor :( Arduino Mega 2560 Adafruit Fingerprint Sensor

I'm getting the following error when I try to enroll fingerprints using the Arduino Mega 2560 microcontroller along with a Fingerprint Scanner: Did not find fingerprint sensor :( The exact devices ...
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25 views

Making a ATMega328P-PU and computer communicate but not by standard serial communication

So i have been trying to make a ATMega328P-PU using the Arduino bootloader and a computer communicate the same way brands like Logitech and Razer makes their mouse's and keyboard's communicate with ...
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1answer
40 views

ESP8266 SoftwareSerial not receiving any character

I want to use a ESP8266 (ESP12) to receive data from a counter at 9600 baud via SotwareSerial. But my program does not receive any data. I broke it down to the code i attach here. I tried it using ...
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1answer
50 views

Why my serial message won't show on another when I try use 2 Arduino communication

I am trying to make a simple chatting program with my 2 arduino uno and 2 PC. But when I tried write a message using PC1 serial monitor the message won't show up on PC2 serial monitor. I can't see the ...
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2answers
43 views

Software serial conflict with WiFi on ESP8266

I'm trying to use an ESP8266 (Wemos D1 mini) to read from a 19.2K serial port and report the results over WiFi. Programming is via Arduino IDE. The code to read the port works just fine if WiFi is not ...
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115 views

Ov7670 (without FIFO) captures the images twice at the same time

I recently started working on an security camera system, with an arduino uno and an OV7670 camera without FIFO memory, and an ESP-8266 to transfer the images to a webserver. Everything is working, ...
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1answer
64 views

Can't replace SoftwareSerial by Serial1 on Mega board

This sketch runs well with SoftwareSerial define and the monitor displays device modbus values. But now, i want to replace SoftwareSerial by Serial1 and i have no data. This is the sketch with ...
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1answer
70 views

vk2828u7g5lf GPS module over SoftwareSerial

So my goal was simple. Trying to get a GPS speed, and show it on a display (later use it to control a stepper motor). I am using the vk2828u7g5lf GPS module from Banggood, which after days of ...
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68 views

mySerial.available() is returning 0

I am using bluetooth hc-05, arduino uno and ap app created by mit app inventor.The problem is myserial.available is returning 0 and hence its loop is not getting executed. I had connected four pins of ...
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2answers
201 views

ESP8266 ASCII to HEX convertion and checking

I am trying to convert ASCII to hex and check if the hex is equal to that hex that I want. For example: 1B 42 05 it means B in ASCII, I need to check if that hex is equal to 1B 42 05. Here I need ...
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1answer
351 views

getting error 'Serial' was not declared in this scope

I am adding Dust Sensor to my particle photon project at home, I got this GitHub project that I want to test before implementing a final code. I am not an expert in cpp, I wanted to modularise the ...
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3answers
133 views

I can send on software serial, but not read?

I've been cracking my head over this for a long while. Like many before me, I'm trying to send and receive data from a HM-10 bluetooth module, arduino mega adk and the app called BLE Scanner. I've ...
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1answer
22 views

Serial data not parsed correctly

The code I have works for the most part but when I send data via bluetooth received over software serial, too quickly, it is not parsed correctly. I'm a bit stuck with what can be done to a void the ...
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2answers
435 views

Alternative Rx/Tx Pins for Arduino Uno and Pro Mini

Do they have specific pins that is best to be use as Rx/Tx pins (aside from D0 and D1)? If so, what makes them special? edit: What pin feature i should look out for when choosing the rx/tx pin? Is ...
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1answer
191 views

ESP8266 Software serial to ATmega 328 is not properly working

Thanks in advance.. We are having esp8266-12E chip and Atmega328 connected as follows, ESP 12 pin as Tx,13 pin as Rx && Atmega328 13pin as Rx, 12pin as Tx. Everything works fine, but while ...
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61 views

Accessing one code using another code on RobotDyn Uno+WiFi board [closed]

Ok so I've been trying to do this for quite some time now. Still couldn't get it to work. I am trying to read a ESP8266 WiFi program from a normal Arduino Uno program. I've seen some people do this: #...
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1answer
162 views

Unexpected result with the GSM module A6

I have a GSM A6 module, like this one. I'm going to use an Arduino Nano as a bridge to communicate with it, I have an external power source (since I read that this module can consume up to 2A at its ...
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52 views

Unable to receive data when using multiple SoftSerial on Arduino Nano

I am trying to use several (four) software-based serial ports to talk to different peripheral hardware. However, I am unable to receive data through the SoftSerial when using more than one software ...
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208 views

array to serial

i want to send an array of int to another arduino by serial. To garantie a better robust during the transmission, i added < and > with endMarker and startMarker. The receiver wait until the ...
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2answers
87 views

Two serials can't work on the same speed

I have a device which sits on pins 10/11 of Arduino UNO. I am trying to send commands from my PC using Arduino to relay my commands to the device via Serial. The problem is that if I use speed 9600 ...
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2answers
482 views

how to make GPRS/GSM SIM900 shield work with gps neo-6M module using Arduino UNO board

I'm a beginer to arduino program.i will like to make a program that will send latitude and longitude on my mysql database.so since 3 days i try to learn how to use all this material(GPRS/GSM SIM900 ...
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1answer
218 views

Passing HardwareSerial and SoftwareSerial as a Class Property

I wish to know if there is a way to use a single property Serial0 to hold a HardwareSerial or a SoftwareSerial or other class instances supporting basic methods such as available(), read() and write(),...
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1answer
303 views

Bluetooth OBD2 ELM327 connectivity issues

I made a little project using an Arduino UNO, a 3.5" display, a HC-05 bluetooth module and an ELM327 (cheap ebay clone). I managed to establish communication, read the data, interpret and display it, ...
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1answer
53 views

Is two modules using Serial Interface on one Arduino Uno possible?

I was wondering if I have both a Bluetooth HC-05 module and a GPS module (uBlox 7N) is it possible both for both to be using the serial interface? I'm aware they cant be operating simultaneously ...
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2answers
426 views

How to write a library that support both HW and SW Serial communication and allow user to chose which one to use?

I'm working on a library for Arduino/ESP8266/Teensy that use serial to send AT commands. I want to make it as customizable as possible, so I avoided to hardcode the serial and I ask for a reference in ...
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1answer
31 views

Entire arrays are not read by Processing sent by Arduino unless cord is unplugged and plugged back in?

I am using an Arduino to read sensors and then send the data to the serial port for Processing to read. It works totally fine when I first download the code and run the Processing program. But if I ...
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3answers
50 views

For Arduino, is there a meaningful difference between carriage returns?

Serial.write(0x0d); // hex Serial.write(13); // ASCII Serial.write('\r'); // char Is one more efficient? I read how it depends on the terminal program. So does that mean the IDE? (This is my ...
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1answer
670 views

Sending PUBX commands to GPS Board (Ublox NEO-6M) through SoftwareSerial

I am having trouble parsing NMEA sentences coming from a GY-NEO6MV2 board (https://www.cytron.io/p-gps-neo6mv2), using the TinyGPS (https://github.com/mikalhart/TinyGPS) library. The GPS board itself ...
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1answer
71 views

Serial communication between 2 arduino's doesn't works when Sending string in a program with a lot of functions

Note : This question is completely different from the questions that I have asked before although the code snippets might be the same, So please do not waive it as a duplicate right when you see ...
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1answer
54 views

HC-05 modules with joystick driven platform [closed]

I am working to create a joystick controlled platform using bluetooth to communicate, but am having several problems. The platform https://www.dfrobot.com/wiki/index.php/Cherokey_4WD_Mobile_Platform_(...
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59 views

Arduino loses communication with bluetooth when sending commands to nodemcu esp8266

i've been working on a project using an Arduino UNO, Bluetooth Module HC-06 and NodeMCU esp8266, the project consists on turning leds on via bluetooth and telling the esp8266 that the leds were turned ...
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62 views

Serial communication between GPS and Arduino Ethernet

I'm trying to read out GPS positions from a serial GPS module I have. I'm using an Arduino Ethernet and a Haicom HI-204 III GPS (http://www.haicom.com.tw/driver/hi-204iii_usb.pdf). If I connect the ...
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3answers
56 views

Bluetooth Modules not communicating correctly

I plug in BT rx to digital 11, BT tx to digital 10 and then 5v and ground from the HC-05 to the arduino. I then upload this code to the HC-05 that is set as a master. #include <SoftwareSerial.h>...
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229 views

How to check for valid Serial data, then break?

I'm having trouble completing this code for my university final project. I feel like I'm almost there, but I can't seem to find the final buttons to press. I'm using the Arduino Pro Micro. I have one ...
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3answers
79 views

Read one value from continuous data stream at a lower frequency

I am working on a university final project and have run into a problem with programming Arduino, after a 3 year hiatus. I have a pressure transducer that is sending pressure data at 10Hz. I have ...
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1answer
86 views

Arduino Mega Pins for SoftwareSerial (vs. AltSoftSerial)

I am currently looking at using an Arduino Mega to build a MIDI Receive box that will then pump the data over USB, but am having design issues/uncertainties with the Arduino's receiving end. I am ...